From a CT image using black and white scale and calibrated with HU, the bone will show:
A. Black
B. Gray
C. White
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Which of the following statements is correct (only one answer is correct)：
A. CT uses X-ray discovery and the development of new mathematical algorithms.
B. CT developed from optical imaging
CT is based on high-frequency ultrasound imaging
What important technological advancement has CT pioneered in diagnostic imaging?
A. Observe the inside of the human body without using a scalpel
B. Huntsfield Unit
C. The invention of X-ray
During a barium swallow imaging procedure, why is a third view, at an oblique angle necessary?
A. a) To ensure all parts of the organ are imaged.
B. b) In case the previous images didn’t turn out.
C. c) To check for artefacts.
Why is barium sulphate commonly used to improve X-ray image contrast of soft tissues?
A. a) It is much more dense than soft tissues, and non-toxic in solution.
B. b) It is extremely soluble in water.
C. c) It is highly toxic and very reactive.
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